Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Reexamination Certificate
2006-12-07
2008-11-18
Nguyen, Kiet T (Department: 2881)
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
Reexamination Certificate
active
07453061
ABSTRACT:
The present invention relates to a quadrupole mass analyzer which is a core equipment of a majority of mass analyzer, particularly to a quadrupole mass analyzer with a hyperbolic surface made of quartz which is capable of enhancing resolving power and analytical performance of a mass analyzer. The quadrupole mass analyzer according to the present invention includes four quartz tubes separated by predetermined distance to form a shape of rotation symmetry and being parallel to each other; an electric part formed with a predetermined area by a platinum membrane being divided into a prefilter electrode part and a main filter electrode part in a longitudinal direction of the quartz tube in a circumferential surface in an axial direction of the rotation symmetry of the quartz tube, a cross-section of the platinum membrane on an opposing quartz tube forming a substantial hyperbolic surface; a quartz pin being chamfered at both ends in a shape with a same radius curvature as the quartz tube and being closely fixed between the adjacent quartz tubes; and an electrically conductive connection member electrically connecting each of prefilter electrode parts and main filter parts of the opposing quartz tubes so as to apply RF and DC electric source.
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Park Chang-Joon
Yoon Sae-Won
Cantor & Colburn LLP
Korea Research Institute of Standards and Science
Nguyen Kiet T
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